trunk access point remains red status

I configured trunks on my fortiswitch to structure the double port of my APs in LACP. on the access points I ran the same command:
cfg -a FAP_ETHER_TRUNK=2

but on a graphic level the trunk on the switch side remains red. I can see the switch through the firewall.

only the first AP installed sees the green trunk, the others remain red.

even the trunk to the firewall itself remains red despite all the ports connected in green. I don't understand why.

the firewall is updated to the latest firmware version available and everything else is updated too.